Self-oiling pin



J. G. ZHWANN SELF OILING PIN May 14, 1929.

Filed March 25, 1925 ATTORN EY ITNESS:

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Patented May 14, 1929 UNITED STATES JACOB ZHWANN, F BROO KLYN, NEW YORK.

SELF-OILING PIN.

Application filed March 23, 1925.

This invention relates to improvements in self oiling pins and the like.

The principal object of the invention resides in pins or posts commonly used in die sets for slidably supporting the die head and to which pins a lubricant is automatically fed, thus eliminating the necessity of oiling the pins by hand at frequent intervals.

Another object of the invention is to pro vide a self oiling pin which includes a reservoir for the reception of a lubricant and into which a wick extends for feeding the lubricant to the exterior surface thereof where it is picked up by a movable part.

A further object is the provision of a self oiling pin which simple in construction, cheap of manufacture and efficient in operation.

"With these and other objects in View, the invention resides in certain novel construction and combination and. arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claim and are illustrated in the accompanying drawing, in which:

Figure 1 is a perspective view of a die set with my invention in use thereon.

Figure 2 is a vertical sectional View on the line 2-2 of Figure 1..

Figure 3 is a horizontal sectional view on the line 3-3 of Figure 2.

Figure 4: is a view of a slight modification.

Figure 5 is a view of a further modification.

Referring more particularly to the drawing, the reference numeral designates a die set which includes a base 11 and a reciprocating die head 12. Pins 13 extend upward from the base 11 for slidably mounting the head 12 thereon and which pins serve as a post or guide for the head in its movement.

Each of the pins 13 is formed with a reservoir 14: which extends approximately the length of the pin, but which is of such size with respect to the diameter of the pin as not to weaken the same for the purpose for which the pin is intended. The reservoir 14 opens at the top of the pinfor filling purposes and is normally sealed by a closure member 15 which mayeither frictionally engage the inner walls of the reser- Serial No. 17,767.

voir or screw threaded therewith. The pin 13 adjacent the top thereof is provided with an annular dove tail groove 16 and which has communication with the reservoir through an opening 17. A wick 18 is seated in the groove 16 and has its free ends passing through the openings 17 and depending in the reservoir which reservoir is adapted to receive a supply of lubricant.

From the foregoing description, it will be seen that a continuous flow of lubricant established between the reservoir and the exterior surface of the pin whereby the entire surface of the pin is lubricated upon each reciprocation of the head 12 of the die set. Although I have specifically men tioned that this principle is applied to die sets, it will be readily understood that the same may be adapted for use upon any stationary part which slidably receives a movable part.

In Figure 1 of the drawing, I have shown a slightly modified form of pin 13 which is formed with a reservoir 14 and which reservoir communicates through openings 17 with a spiral groove 16. It will be seen that this form of the invention is identical to the preferred form with the exception that a spiral groove has been substituted for an annular groove, and which spiral groove affords a greater oiling surface for the movable part.

In Figure 5, there is shown a further modification wherein the same principle is applied to a bushing 20 having an annular reservoir 21 therein for supplying a pair of spaced. wicks 22 which extend into the reservoir and encircle the inner walls of the bushin Filling openings 23 are formed in the top end wall of the bushing whereby the supply of lubricant may be replenished as the same is consumed.

While I have described what I deem to be the most desirable embodiment of my invention, it is obvious that many of the details may be varied without in any way departing from the spirit of my invention, and I therefore do not limit myself to the exact details of construction herein set forth nor to anything less than the whole of my invention limited only by the appended claim.

What is claimed as new is A vertically disposed pin for a die set having a reservoir therein for a lubricant,

said pin having a circumferential dovetailed groove therein and an aperture connecting the same With the reservoir, a vertically reciprocating die head boredto slidably fit said pin, and: a wick disposed by its center portion in said groove, the terminals of said Wick being located in the lubricent to feed the latter through said apertune-b0" said central portion for mutual designature.

JACOB G. ZHWANN. 

